统计一篇英文文章中出现次数最多的10个单词

墨蓝 2022-05-13 02:28 203阅读 0赞

[https://blog.csdn.net/u010512607/article/details/40005641][https_blog.csdn.net_u010512607_article_details_40005641]

**思路：**

> 1.读入文件，按行将文字拼接成字符串str  
> 2.用正则过滤字符串中的标点，再分割成str\[\]  
> 3.用hashmap依次统计每个单词出现的次数（可以加黑名单过滤情态动词等）  
> 4.对hashmap的值排序（利用Collections的sort，重写比较器Comparator的compare）  
> 5.输出hashmap前10个单词

**代码：**

public class Main{
        
        public static void main(String[] args) throws IOException {
            readPaper();
    }
    
        //统计一篇英文文章中出现次数最多的10个单词
        public static void readPaper() throws IOException{
    
            HashMap<String, Integer> wordMap = new HashMap<String, Integer>();
    
            File file = new File("e:/info.log");
            BufferedReader br=new BufferedReader(new FileReader(file));
    
            StringBuilder sb=new StringBuilder();
            String line=null;
            while((line=br.readLine())!=null){
                sb.append(line);
            }
            br.close();
    
    
            String words=sb.toString();// 全部的单词字符串
            String target=words.replaceAll("\\pP|\\pS", "");// 将标点替换为空
            //小写 p 是 property 的意思，表示 Unicode 属性，用于 Unicode 正表达式的前缀
            //大写 P 表示 Unicode 字符集七个字符属性之一：标点字符
            //大写S：符号（比如数学符号、货币符号等）；
            String[] single=target.split(" ");
    
    
            String[] keys={ "you", "i", "he", "she", "me", "him", "her", "it",
                    "they", "them", "we", "us", "your", "yours", "our", "his",
                    "her", "its", "my", "in", "into", "on", "for", "out", "up",
                    "down", "at", "to", "too", "with", "by", "about", "among",
                    "between", "over", "from", "be", "been", "am", "is", "are",
                    "was", "were", "whthout", "the", "of", "and", "a", "an",
                    "that", "this", "be", "or", "as", "will", "would", "can",
                    "could", "may", "might", "shall", "should", "must", "has",
                    "have", "had", "than" };
    
            // 将一部分常见的无意义的英语单词替换为字符 '#' 以便后面输出单词出现次数时的判断
    //      for(int i=0;i<single.length;i++){
        
    //          for(String str:keys){
        
    //              if(str.equals(str)){
        
    //                  single[i]="#";
    //              }
    //          }
    //      }
    
            // 将单词以及其出现的次数关联起来
            for(int i=0;i<single.length;i++){
                if(wordMap.get(single[i])==null){
                    wordMap.put(single[i],1);       
                }else{
                    wordMap.put(single[i], wordMap.get(single[i])+1);
                }
            }
    
            //比较器，按值排序
            List<Entry<String,Integer>> list=new ArrayList
                    <Entry<String,Integer>>(wordMap.entrySet());
            Collections.sort(list,new Comparator<Entry<String,Integer>>(){
    
                @Override
                public int compare(Entry<String, Integer> o1,
                        Entry<String, Integer> o2) {
                    return o2.getValue()-o1.getValue();
                }
    
            }
                );
    
    
            //输出次数最多的单词
            int count=1;
            for(Map.Entry<String, Integer> entry:list){
                if(entry.getKey().equals("#")){
                    continue;
                }
                System.out.println(entry.getKey()+":"+entry.getValue());
                count++;
                if(count==11){
                    break;
                }
            }
        }

[https_blog.csdn.net_u010512607_article_details_40005641]: https://blog.csdn.net/u010512607/article/details/40005641